Read each question carefully and then select the best answer.

1		Genetic determinism states that the expression of an inherited trait cannot be modified by the environment.
			A)	True
			B)	False
2		Behavioral disorders may result from mutations in genes affecting:
			A)	neurotransmission
			B)	signal transduction
			C)	neuron variation
			D)	Any of the above.
3		Which of the following statements is true in the U.S. population?
			A)	Phobias are less prevalent than schizophrenia.
			B)	ADHD is less prevalent than autism.
			C)	Eating disorders are less prevalent than Alzheimer disease.
			D)	Drug addiction is less prevalent than eating disorders.
4		The fatty sheath that coats the neuron is called _______.
			A)	the synapse
			B)	myelin
			C)	a neurotransmitter
			D)	myoglobin
5		The cells that produce nerve growth factors are called ______ .
			A)	neurons
			B)	neuroglial cells
			C)	neurotransmitter cells
			D)	support cells
6		Dopamine is the focus of research in which of the following diseases?
			A)	ADHD
			B)	autism
			C)	Asperger syndrome
			D)	All of the above.
7		Which of the following statements is true regarding anorexia nervosa?
			A)	Only females suffer from anorexia.
			B)	Anorexia has the highest risk of death of any psychiatric disorder.
			C)	Genes whose products control appetite are not implicated in eating disorders.
			D)	All of the above are true regarding anorexia nervosa.
8		An individual with familial advanced sleep phase syndrome (FASPS) is likely to _____.
			A)	promptly fall asleep at the same time each night
			B)	fall asleep several times during the day
			C)	also suffer from cataplexy
			D)	have above average intelligence
9		The genes for narcolepsy were first identified in _____.
			A)	cats
			B)	dogs
			C)	humans
			D)	fruit flies
10		Studies of interactions between hypocretin and orexin are associated with which of the following diseases?
			A)	narcolepsy
			B)	ADHD
			C)	eating disorders
			D)	FASPS
11		Twin and adoptive studies suggest that the heritability of IQ _____.
			A)	stays the same through all age groups
			B)	decreases with age
			C)	increases with age
			D)	does not follow any particular trend
12		Which of the following statements is true regarding IQ?
			A)	Environmental impact on IQ increases with age.
			B)	The gene for a neural adhesion molecule may be associated with intelligence.
			C)	Very few chromosomal disorders affect intelligence.
			D)	None of the above are true.
13		Tolerance
			A)	measures the severity of withdrawal symptoms when a person stops taking a drug.
			B)	is a characteristic of drug addiction.
			C)	is the need to take less of a drug to achieve the same results.
			D)	is a measure of the toxicity of a drug.
14		There are no legal addictive drugs.
			A)	True
			B)	False
15		Alcoholism variants may be associated with the A1 allele of a ____ receptor gene.
			A)	apolipoprotein
			B)	dopamine
			C)	leptin
			D)	melanocortin-4
16		Endorphins ________.
			A)	bind to receptors on human neurons
			B)	are the human equivalent of opiates
			C)	provide pain relief
			D)	All of the above are true regarding endorphins.
17		Which of the following statements is true regarding behavioral traits and disorders?
			A)	Eating disorders have been associated with dopamine transporters.
			B)	Addiction may be related to myelin synthesis.
			C)	ADHD may be associated with the leptin receptor.
			D)	Intelligence may be related to serotonin synthesis.
18		Bipolar affective disorder ________ .
			A)	is associated with a single chromosomal site
			B)	is more common than major depressive disorder
			C)	is likely caused by deficits of serotonin or norepinephrine
			D)	All of the above are true regarding bipolar affective disorder.
19		A genetic contribution to schizophrenia is suggested by the
			A)	increased risk of recurrence.
			B)	high concordance between identical twins.
			C)	both a and b
			D)	There is no evidence of a genetic influence.
20		Which of the following statements is true regarding schizophrenia?
			A)	Schizophrenia is related to low levels of serotonin or norepinephrine.
			B)	Chromosome 4 has been implicated in the occurrence of schizophrenia.
			C)	Schizophrenia is sometimes misdiagnosed as bipolar affective disorder.
			D)	None of these statements is true regarding schizophrenia.